Twittering with Python

Twittering with Python
Python libraries for the Twitter API:
Overview and applications
EuroPython 2009 (June 30th 2009, Birmingham)
Andreas Schreiber <Andreas.Schreiber@dlr.de>
German Aerospace Center (DLR), Cologne, Germany
http://www.dlr.de/sc

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EuroPython 2009 > Andreas Schreiber> Twittering with Python > 30.06.2009

Final Version of this Slides is
available on SlideShare

http://tr.im/ep09twt

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Follow this presentation…

twitter.com/python_demo

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What is Twitter?

Micro-Blogging Service
Users can send text messages
Users can receive text messages of others
Text messages can have up to 140 characters
The text messages are called „Updates“ or „Tweets“

Socal Network
One can subscribe to other users („Following“)
Subscriber of own updates are „Follower“
On the Twitter web site one can enter updates and …
see updates of all Friends
Users can control visibility
http://en.wikipedia.org/wiki/Twitter

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Who twitters?

Persons (private persons, „Celebrities“, politicians, …)
Guido van Rossum, Ian Foster, Rainer Calmund, Herrmann Otto Solms
Research centers & universities
DLR, ESA, NASA, Fraunhofer, DHBW Mannheim, FH Köln, Cardiff Uni.
Companies (publishers, IT companies, Dienstleister, …)
O‘Reilly, Heise, Sun Microsystems, Google, XING, Starbucks, Bahn
Software projects & products
Digsby, Dropbox, Plone, Jython, SharePoint, SlideShare, Camtasia
Media (Newspapers, TV stations, TV shows, …)
Bild, Welt, Focus, ZEIT, BBC, CNN, Pro7, TV Total
Conferences and organizations
EuroPython, PyCon, Supercomputing, EclipseCon, Greenpeace

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Guido van Rossum

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DLR_de

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O‘Reilly

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Plone

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Focus Online

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EuroPython

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Web Sites and Technologies

http://twitter.com
Web application developed with Ruby on Rails
Message Queue Server Kestrel (fka. Starling)
developed in Scala
Available under Apache 2.0 License
http://github.com/robey/kestrel/tree/master

http://search.twitter.com
Originally develop by Summize
Real time search over Twitter-XMPP-Stream
Requests with Atom and JSON:
http://search.twitter.com/search.atom?q=<query>
http://search.twitter.com/search.json?q=<query>

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Twitter Basics (1)

Tweet
A Post (message, update) at Twitter
Max. 140 Characters (incl. white space), only text

Timeline
History of the latest updates
„Public Timeline“:
Updates of all users („Everyone“)

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Twitter Basics (2)

Follow
Selection of „Friends“ for your own
timeline („Stream“)
„Followers“ are following you own
updates

Personal Page
You own Timeline
Status informationen

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Twitter Basics (3)

Replies
Response to an other user
To reply, add „@username“
to the message
Replies can be from your „Friends“
or any other user
Direct Messages
Private messages
Can be sent to your “Follower” only,
not to “Friends”
Retweets
„Forward“ of interesting updates to own friends
Usually, Retweets starts with a „RT“

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Hashtags

Hashtags in Twitter messages
Begins with a hash „#“
Often used for events, cities, countries, …
Examples
#birmingham #europython

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Twitter Applications

Web applications

Native Clients
Windows, Mac OS X, Linux
iPod/iPhone
Smartphones

Integration in existing applications
Instant Messenger
Social Networking Services

See list at
http://twitter.pbwiki.com/Apps

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Twitter API

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Twitter API

REST-based API
HTTP-Requests
Data formats: XML, JSON, RSS, Atom
Authentication with OAuth or HTTP Basic Authentication
Error messages are provided (e.g., in XML):
<?xml version="1.0" encoding="UTF-8"?>
<hash>
<request>/direct_messages/destroy/456.xml</request>
<error>No direct message with that ID found.</error>
</hash>

Limitation: Max. 100 Requests in 60 minutes per client
Based on: IP (unauthorized) or User ID (authorized)

Documentation: http://apiwiki.twitter.com

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API Methods (1)

Status Methods User Methods
public_timeline friends
friends_timeline followers
user_timeline featured
show show
update Direct Message Methods
replies direct_messages
destroy sent
Account Methods new
verify_credentials destroy
end_session Friendship Methods:
archive create
update_location destroy
update_delivery_device exists

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API Methods (2)

Favorite Methods Notification Methods
favorites follow
create leave
destroy
Block Methods
Help Methods create
test destroy
downtime_schedule

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Authentication
Two Techniques to Authenticate with the REST API

Basic Auth
Sends user credentials in the header of the HTTP request
Easy to use, but insecure and difficult to track

OAuth
Token-passing mechanism
Allows users to control which application
have access to their data without
giving away their passwords
Specification: http://oauth.net/
Registration of clients:
http://twitter.com/oauth_clients

http://oauth.net/core/1.0/

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Twitter API: Getting Started (1)
Public Timeline

Getting the Public Timeline (last 20 entries)
As RSS
curl http://twitter.com/statuses/public_timeline.rss

As JSON
curl http://twitter.com/statuses/public_timeline.json

As XML
curl http://twitter.com/statuses/public_timeline.xml

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Timeline of your own „Friends“

curl -u python_demo:***
http://twitter.com/statuses/friends_timeline.xml

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Posting of „Updates“
curl -u python_demo:****
-d status="This message was sent using cURL"
http://twitter.com/statuses/update.json

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Libraries

List of libraries: http://apiwiki.twitter.com/Libraries
ActionScript / Flash
C++
C#/.NET
Java
Objective-C/Cocoa
Perl
PHP
PL/SQL
Python
Ruby
Scala

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Twitter Libraries in Python

Python Libraries
python-twitter by DeWitt Clinton.
This library provides a pure Python interface for
the Twitter API.
python-twyt by Andrew Price.
BSD licensed Twitter API interface library and
command line client.
twitty-twister by Dustin Sallings.
A Twisted interface to Twitter.
Python Twitter Tools (PPT) by Mike Verdone
a Twitter API, command-line tool, and IRC bot

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python-twitter
Pure Python Interface for the Twitter API

Project information
Project site: http://code.google.com/p/python-twitter/
Author: DeWitt Clinton (Google; http://unto.net)
Apache License 2.0

Provided functionality
Supported Methods: Status, User, Direct message
Authentication: Basic Auth
Provides a Python wrapper around the Twitter API and data model

Requirements
simplejson (http://cheeseshop.python.org/pypi/simplejson)

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Twyt
A Twitter API interface for Python

Project information
Project site: http://andrewprice.me.uk/projects/twyt/
Author: Andrew Price
BSD License

Supported Methods: Status, User, Direct Message, Friendship, Social
Graph, Block
Authentication: Basic Auth, OAuth

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twitty-twister
A Twisted interface to Twitter

Project information
Project site:
http://github.com/dustin/twitty-twister/tree/master
Author: Dustin Sallings
License: ?

Supported methods: Status, User, Direct message, Friendship
Authentication: Basic Auth, OAuth

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Python Twitter Tools (PTT)
Twitter API, command-line tool, and IRC bot

Project information
Projekt site: http://mike.verdone.ca/twitter/
Author: Mike Verdone
MIT License

Supported methods: status, user, direct message
Authentication: Basic Auth
IRC bot that can announce Twitter updates to an IRC channel

Requirements
irclib (http://python-irclib.sourceforge.net)

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Comparison
Python Twitter Libraries

Library Supported API Supported Requirements
Methods Authentication

Python-twitter Status, User, Direct Basic Auth simplejson
message

Twyt Status, User, Direct Basic Auth,
Message, OAuth
Friendship, Social
Graph, Block
Twitty-twister Status, User, Direct Basic Auth, Twisted
message, OAuth
Friendship
Python Status, User, Direct Basic Auth (irclib)
Twitter Tools message

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Examples and Demos

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Example
Get all Updates of a User

import twitter

api = twitter.Api()

statuses = api.GetUserTimeline('DLR_de')
print [s.text for s in statuses[:5]]

[u"Video: @NASA's SOFIA mission update http://tinyurl.com/cmmna3
#SOFIA (Stratospheric Observatory For Infrared Astronomy)", u'Video
zur GOCE-Mission (Messung der Schwerkraft) http://tinyurl.com/c5zhdb
#euronews', u'(EN) Now following @ESAGermany and @ESAGOCE',
u'@AndreasSchepers Gute Frage. Immerhin hat die NASA-Mission
keinen Vornamen. #Johannes #ATV #NASA', u'RT @AndreasSchepers
Thomas Reiter: Wir wissen mehr xfcber den Mars als den Mond.
http://is.gd/k7qZ #Mp3 #DeutschlandRadioKultur #DLR-Vorstand']

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Example
Posting an Update

import twitter

api = twitter.Api(username='python_demo',
password='***')

api.PostUpdate('Moin!')

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Example
Adding a Friend („Follow“)

import twitter
api = twitter.Api(username='python_demo', password='***')

user = api.CreateFriendship('pycologne')
print user
{"description": "Python User Group Cologne", "id": 23515458, "location":
"Cologne, Germany", "name": "PyCologne", "profile_image_url":
"http://s3.amazonaws.com/twitter_production/profile_images/91413444/p
ycologne_logo_small_quadratisch_normal.jpg", "screen_name":
"pycologne", "url": "http://www.pycologne.de"}

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Example
„tail –f“ to Twitter
# based on http://code.activestate.com/recipes/157035/
import time, os

import twitter
api = twitter.Api(username='python_demo', password=‘***')

file = open('test.log','r')

# ... <Find the size of the file and move to the end>

while 1:
where = file.tell()
line = file.readline()
if not line:
time.sleep(1)
file.seek(where)
else:
api.PostUpdate(line)

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Example
„tail –f“ to Twitter

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Demo
Twitter in Software Engineering

Notifications from SVNChecker (http://svnchecker.tigris.org/)

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Demo
Twitter on Smart Phones

Posting incoming SMS to Twitter account

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Demo
Twitter Notification from MoinMoin Wiki

Twitter handler for the MoinMoin Event System

python-twitter

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